I did one blind with a surgeon a few weeks ago. Went quite well. And that was in the face of an lma/bag mask ventilation because I couldn't tube him, I think I actually opened a thread on this.
Anyway, despite it going very well, it's one of 2 perc trachs I've been a part of that were without bronch guidance. Both were emergent. And both were also modified as we did do some sort of a cut down though not a true open trach. In general, the surgeons will only do these bronch guided.
My N is only about 7-8 but haven't had a bleeding problem yet. Though obviously I've had an experienced surgeon assisting me every time.
For my practice as an intensivist, all I really want to be able to do is a an emergent cric. But I have to say the more of these I do the more comfortable I would be doing one in a pinch if an airway goes south, though that is in part because I have only had the ability to do one actual cric. Everyone else had enough time to get a perc trach.